feat: migrate from Cedar to SpiceDB authorization system

This is a major architectural change that replaces the Cedar policy-based
authorization system with SpiceDB's relation-based authorization.

Key changes:

- Migrate from Rust to Go implementation
- Replace Cedar policies with SpiceDB schema and relationships
- Switch from envoy `ext_authz` with Cedar to SpiceDB permission checks
- Update build system and dependencies for Go ecosystem
- Maintain Envoy integration for external authorization

This change enables more flexible permission modeling through SpiceDB's
Google Zanzibar inspired relation-based system, supporting complex
hierarchical permissions that were difficult to express in Cedar.

Breaking change: Existing Cedar policies and Rust-based configuration
will no longer work and need to be migrated to SpiceDB schema.

1 files changed, 0 insertions, 34 deletions

diff --git a/vendor/rustix/src/event/mod.rs b/vendor/rustix/src/event/mod.rs
deleted file mode 100644
index 29dfc227..00000000
--- a/vendor/rustix/src/event/mod.rs
+++ /dev/null
@@ -1,34 +0,0 @@
-//! Event operations.
-
-#[cfg(any(linux_kernel, target_os = "illumos", target_os = "redox"))]
-pub mod epoll;
-#[cfg(any(
-    linux_kernel,
-    target_os = "freebsd",
-    target_os = "illumos",
-    target_os = "espidf"
-))]
-mod eventfd;
-#[cfg(bsd)]
-pub mod kqueue;
-#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
-mod pause;
-mod poll;
-#[cfg(solarish)]
-pub mod port;
-#[cfg(any(bsd, linux_kernel, windows, target_os = "wasi"))]
-mod select;
-
-pub use crate::timespec::{Nsecs, Secs, Timespec};
-#[cfg(any(
-    linux_kernel,
-    target_os = "freebsd",
-    target_os = "illumos",
-    target_os = "espidf"
-))]
-pub use eventfd::{eventfd, EventfdFlags};
-#[cfg(not(any(windows, target_os = "redox", target_os = "wasi")))]
-pub use pause::*;
-pub use poll::{poll, PollFd, PollFlags};
-#[cfg(any(bsd, linux_kernel, windows, target_os = "wasi"))]
-pub use select::*;